Feed heating and superheating boiler.



s. A. REE'VE FEED HEATING AND SUPERHEATING BOILER. APPLICATION FILEDMAR. 2,1906.

960,704, Patented June 7, 1910.

ANDREW a GRAHAM c0 FNDTO-LITHDGNAPHERS, wAsm UNITED STATES PATENT @FIGE.

SIDNEY A. REEVE, 0F WORCESTER, MASSACHUSETTS, ASSIGNQR T0 CHARLES E.BROWN, TRUSTEE, OF READING, MASSACHUSETTS.

FEED HEATING AND SUPERHEATING BOILER.

Specification of Letters Patent.

Patented June '7, 1910.

To all whom it may concern:

Beit known that I, SIDNEY A. Brave, a citizen of the United States,residing at Vorcester, in the county of WVorcester and State ofMassachusetts, have invented cer tain new and useful Improvements inFeed Heating and Superheating Boilers, of which the followingspecification and accompanying drawings illustrate the invention 1n aform which I now regard as the best out of the various forms in which itmay be embodied.

This invention relates to locomotive-type boilers employing superheaterswhich are made up of coils or sections of steam-pipe occupying agas-chamber in the barrel of the boiler.

The invention consists in an improved form of double superheater whichmay be disconnected or taken apart in sections and preferably capable ofremoval and replacement from both sides of the boiler.

In its preferred embodiment my invention involves the use of a pluralityof eduction-pipes or headers which, when employed with a doublesuperheater of the character mentioned, promote the accessibility andremovability of parts and also enable the eduction-pipes and other partsof the superheater to avoid certain chambers of the boiler in theirpassage to the cylinders. The superheater is thus especially adapted toa loca-.

tion at an intermediate point in the passage of the gases toward thestack. For example it may be located between vaporizing and preheatingportions of the boiler although not confined to such a location. Afurther feature of the invention consists in making the attachment ofalternate tubes on opposite sides of the manifolds.

Of the accompanying drawings, Figure 1 represents a longitudinal sectionof the forward part of a boiler provided with my improved superheater.Figs. 2 and 3 represent sections on the lines 2-2 and 3-3 of Fig. 1.Fig. 1 represents a detail side elevation of the upper header of thesuperheater and connected coils. Fig. 5 represents a sectional view on areduced scale, showing the loc0- motive.

10 represents the shell or barrel of the boiler, provided with arearward set of firetubes 11 contained in a vaporizingchamber 120 and aforward set of fire-tubes 40 contained in a preheating-chamber 13. Theadj acentends of the two sets of tubes are expanded into tube-sheets 12and llO, and between their ends is located a gas-chamber 15 containingthe superheater, which thus encounters the gases while they are at acomparatively high temperature.

18 is the forward smoke-box or gas-chamher having a stack outlet 19 tothe atmosphere. The boiler is fed by a feed-pipe 17 entering thepreheating-chamber l3 and the hot feed-water flows from this chamberinto the vaporizing-chamber 120 through pipes 41.

20 are the engine cylinders located in the usual position in thelocomotive and having valve chests 21.

22 is the dry-pipe for the steam leading from the steam-dome of thevaporizingchamber 120 in the usual manner; butjinstead of proceedingdirectly to the steamchests of the cylinders it terminates in a bodyextension or manifold 23 located in the gas-cl1amber 15. This memberforms the induction-manifold for the superheater and it has connectedwith it two sets of superheating coils 27 whose lower ends are connectedrespectively with two eduction headers or manifolds 28 leading forwardto the cylinders and connecting with the steamchests and with each otherby a cross passage 29 in the cylinder casting 3 1. Thus either set ofcoils may feed both cylinders. The upper ends of the coils are attachedto the induction-manifold 23 by means of fittings 30 and bolts 31, whilethe lower ends are connected with the eduction-manifolds 28 by fittings32 and bolts 33. The upper fastenings are accessible through an open ingin the wall of the gas-chamber 15 which is provided with a removablecover 2 1, and the coils are made accessible and withdrawable throughopenings in either side of said chamber which are normally closed byremovable covers 26. The eduction-pipes or manifolds 28 may be incasedfor a portion of their length by sheathings 25 (omitted in Fig. 1). Inthis particular embodiment the superheating-coils 27 in the two setsoverlap each other, the coils of one set projecting into the spacesbetween the coils of the opposite set, while both ends of each coil areon the same side of the boiler, thus promoting their ready removability.Not only does this opposite attachment of alternate coils contribute tothe substantial filling of the gas-space with superheating surface, butltgains for each fastening to upper or lower manifold the lateral spaceafforded by two ideas without departing from my invention.

I claim A locomotive type superheating boiler comprising avaporizing-chamber traversed by the furnace gases and havin asteamoutlet, a gas-chamber forward of the vaporizing-chamber having sideopenings in its opposite walls provided with removable covers, an uppermanifold structure connected with the steam-outlet of said vap0-rizing-chamber, two eduction-manifolds, two sets of superheatingcoilsoccupying said gas chamber and removable respectively through theopposite side openings of the chamber, and removable fasteningsconnecting the ends of said coils with the upper and lower manifolds.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses the 26th day of February 1906. 1

SIDNEY A. REEVE.

Vitnesses HENRY L. PARKER, HENRY L. PARKER, J r.

